In the Source selection step, select the source for training and testing data that is
    required to create a model. 
    - Optional: 
        To view the required structure of the training and testing data as well as sample
          records, click Download template. 
      
- 
        Upload training and testing data by click Choose file and
          selecting a CSV, XLS, or XLSX file in your directory. 
        The file must contain sample records with the assigned sentiment values. The records
          in this file are used for sentiment model training and testing. 
- 
        To view the first 50 records from the selected file, scroll down to the
            Preview section.
      
- 
        Click Next.